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Site investigation equipment developed by Teollisuuden Voima Oy

Technical Report:

Abstract

Teollisuuden Voima Oy (TVO) carries out site investigations in Finland for final disposal of nuclear high level waste during 1987-2000. In order to carry out the investigations some essential equipment have been designed and constructed. The biggest insufficiency among different measuring methods was among water sampling and hydraulic testing. There are some common specifications which all of these equipment has to fulfil. The two most important are that they have to be operatable in deep slim boreholes down to 1000 meters depth with 56 mm in diameter. The main purpose of the Hydraulic Testing Unit is to determine hydraulic conductivity in crystalline rock, where water can flow primarily through fractures. In most commonly used configurations, measurement range is from 10{sup -}11 to 10{sup -}5 m/s with constant-head method. Although constant-head method is principally used, almost any known hydraulic method is possible with existing hardware. Most functions are controlled by the computer. The whole system is built into an electrically heated trailer. The system consists of inflatable packers, stainless steel rods, pressure transducers and datalogging devices. The maximum number of monitoring sections is seven. In addition to that as many blind sections as is needed to prevent vertical flow in boreholes  More>>
Authors:
Oehberg, A [1] 
  1. Saanio and Riekkola Consulting Engineers, Helsinki (Finland)
Publication Date:
Feb 01, 1991
Product Type:
Technical Report
Report Number:
YJT-91-06
Reference Number:
SCA: 052002; 540250; PA: AIX-23:007604; SN: 92000619549
Resource Relation:
Other Information: PBD: Feb 1991
Subject:
12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; 54 ENVIRONMENTAL SCIENCES; SITE SURVEYS; MEASURING INSTRUMENTS; UNDERGROUND DISPOSAL; BOREHOLES; EQUIPMENT; GROUND WATER; HYDRAULIC CONDUCTIVITY; RADIOACTIVE WASTE DISPOSAL; ROCKS; 052002; 540250; WASTE DISPOSAL AND STORAGE; SITE RESOURCE AND USE STUDIES
OSTI ID:
10104094
Research Organizations:
Voimayhtioeiden Ydinjaetetoimikunta, Helsinki (Finland)
Country of Origin:
Finland
Language:
English
Other Identifying Numbers:
Other: ON: DE92612734; TRN: FI9100126007604
Availability:
OSTI; NTIS (US Sales Only); INIS
Submitting Site:
FIN
Size:
54 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Oehberg, A. Site investigation equipment developed by Teollisuuden Voima Oy. Finland: N. p., 1991. Web.
Oehberg, A. Site investigation equipment developed by Teollisuuden Voima Oy. Finland.
Oehberg, A. 1991. "Site investigation equipment developed by Teollisuuden Voima Oy." Finland.
@misc{etde_10104094,
title = {Site investigation equipment developed by Teollisuuden Voima Oy}
author = {Oehberg, A}
abstractNote = {Teollisuuden Voima Oy (TVO) carries out site investigations in Finland for final disposal of nuclear high level waste during 1987-2000. In order to carry out the investigations some essential equipment have been designed and constructed. The biggest insufficiency among different measuring methods was among water sampling and hydraulic testing. There are some common specifications which all of these equipment has to fulfil. The two most important are that they have to be operatable in deep slim boreholes down to 1000 meters depth with 56 mm in diameter. The main purpose of the Hydraulic Testing Unit is to determine hydraulic conductivity in crystalline rock, where water can flow primarily through fractures. In most commonly used configurations, measurement range is from 10{sup -}11 to 10{sup -}5 m/s with constant-head method. Although constant-head method is principally used, almost any known hydraulic method is possible with existing hardware. Most functions are controlled by the computer. The whole system is built into an electrically heated trailer. The system consists of inflatable packers, stainless steel rods, pressure transducers and datalogging devices. The maximum number of monitoring sections is seven. In addition to that as many blind sections as is needed to prevent vertical flow in boreholes can be installed. Water sampling is possible either with a double packer method or in conjunction with the hydraulic head monitoring equipment. The first possibility involves using the laboratory trailer and the second one using a separate pumping unit plus the laboratory trailer in a later phase when sampling is to be conducted. In the laboratory trailer there are all the measuring devices needed to control different chemical parameters (pH, Eh, pS, O{sub 2}, conductivity and temperature) during pumping.}
place = {Finland}
year = {1991}
month = {Feb}
}